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-Building the Software on an Acorn RISC OS system
-
-The directory contrib/acorn contains support for compiling the library under
-Acorn C/C++ under Acorn's RISC OS 3.10 or above. Subsequent pathnames will
-use the Acorn format: The full-stop or period character is a pathname
-delimeter, and the slash character is not interpreted; the reverse position
-from Unix. Thus "libtiff/tif_acorn.c" becomes "libtiff.tif_acorn/c".
-
-This support was contributed by Peter Greenham.
-(peterg@angmulti.demon.co.uk).
-
-Installing LibTIFF:
-
-LIBTIFF uses several files which have names longer than the normal RISC OS
-maximum of ten characters. This complicates matters. Maybe one day Acorn will
-address the problem and implement long filenames properly. Until then this
-gets messy, especially as I'm trying to do this with obeyfiles and not have
-to include binaries in this distribution.
-
-First of all, ensure you have Truncate configured on (type *Configure
-Truncate On) Although it is, of course, preferable to have long filenames,
-LIBTIFF can be installed with short filenames, and it will compile and link
-without problems. However, getting it there is more problematic.
-contrib.acorn.install is an installation obeyfile which will create a normal
-Acorn-style library from the source (ie: with c, h and o folders etc.), but
-needs the distribution library to have been unpacked into a location which is
-capable of supporting long filenames, even if only temporarily.
-
-My recommendation, until Acorn address this problem properly, is to use Jason
-Tribbeck's LongFilenames , or any other working system that gives you long
-filenames, like a nearby NFS server for instance.
-
-If you are using Longfilenames, even if only temporarily to install LIBTIFF,
-unpack the TAR into a RAMDisc which has been longfilenamed (ie: *addlongfs
-ram) and then install from there to the hard disk. Unfortunately
-Longfilenames seems a bit unhappy about copying a bunch of long-named files
-across the same filing system, but is happy going between systems. You'll
-need to create a ramdisk of about 2Mb.
-
-Now you can run the installation script I've supplied (in contrib.acorn),
-which will automate the process of installing LIBTIFF as an Acorn-style
-library. The syntax is as follows:
-
-install <source_dir> <dest_dir>
-
-Install will then create <dest_dir> and put the library in there. For
-example, having used LongFilenames on the RAMDisk and unpacked the library
-into there, you can then type:
-
-Obey RAM::RamDisc0.$.contrib.acorn.install RAM::RamDisc0.$ ADFS::4.$.LIBTIFF
-
-It doesn't matter if the destination location can cope with long filenames or
-not. The filenames will be truncated if necessary (*Configure Truncate On if
-you get errors) and all will be well.
-
-Compiling LibTIFF:
-
-Once the LibTIFF folder has been created and the files put inside, making the
-library should be just a matter of running 'SetVars' to set the appropriate
-system variables, then running 'Makefile'.
-
-OSLib
-
-OSLib is a comprehensive API for RISC OS machines, written by Jonathan
-Coxhead of Acorn Computers (although OSLib is not an official Acorn product).
-Using the OSLib SWI veneers produces code which is more compact and more
-efficient than code written using _kernel_swi or _swi. The Acorn port of
-LibTIFF can take advantage of this if present. Edit the Makefile and go to
-the Static dependencies section. The first entry is:
-
-# Static dependencies:
-@.o.tif_acorn: @.c.tif_acorn
- cc $(ccflags) -o @.o.tif_acorn @.c.tif_acorn
-Change the cc line to:
-
- cc $(ccflags) -DINCLUDE_OSLIB -o @.o.tif_acorn @.c.tif_acorn
-
-Remember, however, that OSLib is only recommended for efficiency's sake. It
-is not required.